Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=3, r=3, I={-1,0,1}.
A079985
Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=3, r=3, I={-1,0,1}.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =2a(6) =4a(7) =0a(8) =4a(9) =10a(10) =29a(11) =40a(12) =64a(13) =88a(14) =221a(15) =420a(16) =800a(17) =1280a(18) =2336a(19) =4260a(20) =8325a(21) =15000a(22) =27200a(23) =48360a(24) =89541a(25) =164430a(26) =303300a(27) =549120a(28) =1001156a(29) =1824342
External references
- oeis: A079985